WCS Glossary
- Anion
- Annular Blowout Preventer
- Annular Friction Losses (AFL)
- Annular Pressure Loss (APL)
- Annular Space (Annulus)
- Annular Valve
- Annular Velocity
- Annulus Friction Pressure (AFP)
- ANSI
- Antifoam
- API Gravity
- Apparent Power
- Apparent Viscosity
- Aquathermal Event
- Aromatics
- Asbestos
- ASME
- Asphalt
- Atom
- Atomic Number
- Attapulgite Clay
- Automatic J
- Autoshear